Finding the Fourth Proportional to 1,432.41, 1,976.72 and 811.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.41 : 1,976.72 = 811.41 : x
2. Step 2: Convert to fraction form
   1,432.41/1,976.72 = 811.41/x
3. Step 3: Cross multiply
   1,432.41x = 1,976.72 × 811.41
4. Step 4: Simplify right side
   1,432.41x = 1,603,920.49
5. Step 5: Solve for x
   x = 1,603,920.49/1,432.41
6. Step 6: Final answer
   x = 1,119.74